Tube-cutting machine



Jan.

E. M. HAWKINS TUBE CUTTING MACHINE Filed Jun? 15, 1 92?" 4 Sheets-Shut 2 IN V EN TOR;

ATTORNEYS.

Jan. 8,1929.

E. M. HAWKINS I TUBE CUTTING IAGHIl IE Fil e d June 13, 1927 4 Sheets-Sheet v INVENTOR.

E. M. HAWKINS TUBE CUTTING MACHINE Jan. 8, 1929,

4 Shet s-Sheet 4 Filed June 13, 1927 ATTORNEYS.

roman UhtltED 'srhrss PATENT owner.

unseen. net-ruins, or accusation, new YORK, nssronon so uc. n. KNowL'ron GOM- ZAHY, or noonnsrnh, new roux, ,u CORPORATION or new roux.

*rn'tsn'cotrrmo MACHINE.

Application filed Juice l3,

The invention relates to certain improvements in. tube cutting machines, especially of the type shown in application Serial l lo, i.96351, filed June 3, 192?, and has forum object to provide such machines with a. sun

plo snd'eilicient stop or lockout mechanism, which, when manually set, will prevent engagement oi the cutter mechan sm with the travelling tubing, and, preierubly, v ill also look the trip niecnanism in inoperative relation out of the path of movement of the tubing;'whereby the portions of: tubing that' are defective or otherwise unsatisfactory may be fed through the machine Without bein;- cut.

The invention illustrated. in the 216C011}- panying drawings, in vl1ich:-

Fig. l is a side elevation, partly in section, of the complete machine. W

Fig. ,Qflis a plan View of the machine associatczl' with a tube forming machine.

, Fig. 3 is an enlarged side elevation of certain hi the controlling and operat ng mechanism shown in Fig". 1.

Fig. at a plan View ol' part; ot the mech anisni shown in Fig. I

Fig. 5 is a fragmentary side elevation on an enlarged scale showing the trip 1necha nism'and the coordinated discl iarging means. Fig". 6 is a sectional-plan view taken on thc lino (5 6 of "Fig. 5,.but with the parts in the positions shown in Fig. 3.

Fin. 7 is'an enlarged elevation, portly 1n section, of certain of the operating and controlling mechanisi'ns.

Fig. 0 is a iii nt elevation, partly in section. of the mechanism shown in Fig". 7.

his. 9 is a section on line 9-9 of Fig. 8. l igij. i0 is o sectional end elevation of one elcinentot the clutch mechanism.

Fig. 11 is a detail view,partly in section, of the handle itor operating the lockout mechanism.

llcicrrino; to l igs. 1 end 2 of the drawino s, 1 indicates the bed or table of the machino, which is supported by suitable legs? connected at their bottoms by a cross beam 3 whichconstitutes ine support for a suitable clec-tric'niotor i for operating the 1nech- .30

anisin, upon the shaft of which inotor are mounted belt pulleys and 6. As shown more particularly in Fig. 2, the -frame of ihe machine constitutes a continuation of the frame of a tube forming ,in'achine which the latter,

1927. Serial No. 198,485.

or the like a, a cemented together by anysuitable irdhesive, end which tubing is fed fori lard upon its supporting mandrel with a continuous movement by feeding belt i). While the machine of the present, invention may be conveniently associated with a tube forming machine inch-if desired, may constitute a. component part of it is to be understood that the inventi on is not limited to such association, but the tube cutting machine may be built and operated as a separate unit entirely disasseciuted from the tube forming mechanism, in which case suitable means are provided for feeding tubing in continuous lengths into the machine.

Adjust-ably secured on the top 01 table 1 are pedestals 7,7 in which is journaled a horizontal shaft 8, the outer-end of which is also journaled in a bearin on a bracket 9 secured to the front end of the table. Keyed to the shaft 8 in proper spaced relation are two arms 10, 10. provided attheir ends with journal bearings 10', 10, which supports cutter carrying arbor 11, the outer end of which is journal ed in abearing 12 on arm 12 keyed to the outboard end oi? shaft 8, the

' latteris slidably mounted for longitudinal movement on the arbor 11 and has a splined connection with the latter to be rotated therewith.

Mounted on the top of the table is a ver- I tically adjustable pedestal, 13 carrying at its upper end a trough-like member 14, adapted to receive the tubing to be out, which tubing, indicated at t, is shown as supported on a mandrel 15, said mandrel also constituting a part of the tube forming machine upon which the winding and the stripsof paper are wound inmaking up, I

the tube and the mandrel beingcontinued through the cutting machine. above and in" parallelism with the arbor 11, to constitute a" support :t'or the tubing and the sections being f cut, the extreme end of the mandrel being beyond the outer limit of the tra'verseot the cutting former being connected bya belt to pulley 5 on the shaft of motor 4 and. the member 534 being connected by auhelt so to a pulley 37 fasttothe cutter arbor 11, which insures the continuous drive of the cutters so long as the motor ii: is operated, with the cutter arbor in its lowermost position and the saws or cutters out of contact with the tubing carried by the mandrel, butadapted to be projected into the path of travel of the tubing and to travel with the tubing in the cutting operation, as will be hcreina'lti-r explained.

Journaled in a supporting frame 45 and in bearing bracket 46 on the under side of the table 1 is a. shaft 47, upon which is fastened a pulley 48, which is connected by belt 49 to drive pulley [3 on the shaft of motor 4-, so that said shaft 47 is cmitinuously rotated by the motor 4. Keyedto the shaft l7 within the frame 45 a worm 50 which meshes witha worm gear 5lfast to a cross-shaft 52 journaled in said frame 45, said shaft, therefore, being continuously driven by shaft 47. Also keyed to the shaft 52 is one member 53 of a clutch mechanism, comprising a cuplilre clement adapted to be intermittently coupled with its mating clutch 54, which latter comprises a generally disk-shaped head provided with peripheral cam surfaces 55,

said head being formed as an extension of a sleeve 56 loosely journaled' on shaft v52..

Loosely mounted on the sleeve 56 is aeolian like element 57 having an enlarged head58 provided with a flange 59, which is interposed between the rim of clutch member .53

and the edge of clutch member 54, said flange 59 being provided with pockets or' recesses in which are mounted balls or rollers 60, which are adapted to roll on the cam surfaces of the clutch member 54, each of said balls or rollers being acted upon b a spring 61, tending to force the balls or r01 ers .toward the high ends of the cam surfaces 55.

The inner face of the head 54 on sleeve 56 is provided with an annular -groove in which are mounted springs (52, (32, each spring being confined between a. pin (i3 secured in the bottom of the groove, and a pin (i l secured to the inner face of member 58, the springs 62" tending to rotate said members 54-. and 58 relatively to each other. Formed integrally with thecollar section 571s a flange 5 having diametrically oppositely disposed lugs (16, (37,

which constitute stop devices, which, when engaged by anabutment, cause the cooperating clutch members 53 and 54 to disengage, by first arrestingthe movement of collar 57 and the-head member 58 thereof which moves the balls or rollers down the cam surfaces thereby disengaging the clutch members 53 11111154.. The inertia of the clutch member clevisslide 7:2 mounted in an arm 45 ofhousing 45, said slide being held in yielding engagement with the flange 68 by means of the compression spring 73. r The function of the springs can to initiate the clutch engaging operation, after lug 66 or (57 on collar 57 has been (,lisengaged from its retaining detent, the stored energy of the said springs servin' to impart a partial rotation to collar 57 an head 58, the rim 50 of the latter operating to move the balls or rollers 53 into engagement with the high portions of the cam sur-- faces thereby connecting clutch members 53 and 54.-

The object of providing the collar 57 with two stop lugs 66 and67, and the flange 68 with two notches 69 and 70 is to secure the disengagement of the clutch members at the end of each half revolution, for reasons to be hereinafter explained. 4

Keyed on the sleeve 56 is a'cam 741mvinfi a shoulder 75. En aging the. ri her edge of sa d cam 74 ES a lug 76 seiiiire d to a lever 77 pivoted on shaft 78. Connected to the outer end .ofthe lever 77 is a s ring '79 anchored at its up or endito an a justable eye 80 secured to t e table 1', Also secured to the outer end of lever 77 .is a lift rod 81, which latterat its upper end is secured toone of the swinging arms 10=of the arbor frame by an adjustable connection comprising a screw collar 82 and a slotted rod section 83, the elongated slot of which is engaged by a cross pin 84 secured to member 10,

as shown in Figs. land 2, these parts being so arranged that, 'when the lug 76 engages the high part of cam 74, as shown, in Fig. 9, the saws are held in their lower position out of the pathof movement of tubing, but, as soon as the lug 76 drops oil of the high part of the cam onto the low portion thereof, spring 79 rocks lever 77, elevates rod 81 and swings the frame carrying the saw arbor upward until,

- the saws are projected into the path of travel of the tubing. The purpose of the pin and slot connection between the rod 81 and the. arm 10 of the swingin arbor frame isto pen mit the two half revo utions of the clutch to i be effected during each cutting operation, as

willbe hereinafter explained.

Fast .on sleeve 56 is a cam 85, the-rise of which is gradual through substantinallyone hundred and eighty degrees and terminates.

in a high point which dropsoff quickly to the hub section, which substantially concentric with the sleeve 56. This cam 85 engages a roller 86 journaled on a stud mounted on leye'r 87, which is pivoted on shaft 78 The upper end of the lever 87 is connected by a rod 89, which passes through a block 90, swiv'elled in the clevisend of a rock lever 91, the other end of which is pinned to the end of a vertical shaft 92 journalcd in a vertical bearing 03 formed in bracket 9; Pinned. to the upper end of the shaft 92 is a cap piece 94 having an eye at its top to receive across piu'95 on the ends of which pin are mounted the forked ends of lever 96, the forward end of which latter is provided with a fork carrying block 97, whichcngages an annular groove 98 in sleeve 21; carryin the saws. T his particular coordination (isigned to return the gang of saws to its initial position after each cutting operation, when the high part of cam 85 swings the lever 8'? and causes rod 89'to actuate lever 91, which, in turn, rocks shaft 92 and lever 96 connected thereto to slide tho'eleeve carrying the saws on saw arbor 11. The

. swivel connection between the lever 96 and the cap 94 connected to shaft 92 permits the lever 96 to follow the movement of the saw arbor toward and away from the path of travel of the tubing. I

Pivoted to a bracket extension of the-hous- 'ing 45 at 101 isa rock lever 102, the free end ofwhich is adapted to engage lug 66 or 67, to disengage the members of the clutch and to permit the clutch members to be automaticaly en aged, when the end of said lever is move out of engagement with lug 66 or 67. The opposite end of lever102 is connected to a lift rod 103, which is attached at lts upper enclto a bell crank 104 mounted upon bracket 105 secured to a bar 106 running longitudinal- 1y of the machine in general parallelism with the mandrel, said bar being secured to pedes- Said bellcrank lever is acted upon by a spring 108 attals 107, 107 fast to the table 1.

upw'artl' extension of tin-adjustable slide 1.15

mounted on bar 106.

,The slide 115 carries the trip mechanism which operates the clutch releasing lever 102 and which also, in the machine exemplified, constitutes apart-of the incchanism for automatically discharging or stripping the cut sections-of the tubingfrom the mandrel alt-er each cutting operation. The trip plate per se constitutes one of three radial arms or blades 116, 116, and 116 connected to a hub section 117 journaled on a pin 118 secured to the bracket 114, said hub section having a flange nenw e provided with a log 1'20, diametrically opposite the arm 116, wh' h lug adapted to engage the lower end of ever 112, when the trip plate 116 is swung outwardly by the end of the tubing passing through the machine, thereby causing lever 1 12 to swing on its pivot 113 causing rod 110 to swing to the right, as viewed in Figs. 1, 2, iland 5, rocking: bell crank 104 to cause rod.103 toswing rock lever 102, so that the free end of the latter disengages lug 66 or 67, thereby permitting the effective engagement of the clutch member 53 fast to shaft 52'and clutch member 54, which serves to rotate the sleeve 56 and its associatedelements, the rotation of said member 56 being arrested after each half revolution by the engagement of the/free end oflever 102 with the opposite luglill or 67 as the case may be, which has the ellect of disengaging the loose member ot the clutch and arresting the rotary movement of sleeve 56.

As indicated, the trip mechanism also constitutes a component part of the stripping mechanism for ,dischargingthc sections o'f .the tubing, which is'accomplishcd bycausing the blades 116, 116 and 116 to engage :the severed sections in seqnence and flip :t-hem oil of the end of the mandrel. This operation is-efi'ected by the mechanism more particularly shown in FigdB, 5 and 6, in which 123 indicates a plate secured to the hub section of the trip device, which plate is provided with three peripheral cam surfaces 123 sep-' arated by notches 123", the eripheral edge of the plate being engaged" y a roller 124 mounted on the end of a lever 125 pivoted at 126130 slide 115, the lever being held in adjust'able pressure contact with the periphery. of the cam plate by a spring'l27 connected to the mid section of the lever 125 and anchored to an adjusting screw 128 mounted in a bracket 129 extending upwardly from. the slide 115, the engagement of the roller 124 with the cam surfaces of the plate 123 serving, through the action of spring 127, complete successive rotatory movements of one hundred'and twenty degrees to the hub 117 and, therefore, to the. blades 1'16, 116', 116" secured thereto, the initial rotary movements being eliected by the cngagcmeutof the adwancing tubing with bladesllfl, 116 and 116 Pivoted on the bracketexlcusion of the pedestal 107, which is adjacent. the saw arbor, is an angular lever 130 acted upon by tension spring 131 anchored to the table lop. said lever carrying a latch plate 132 adapted to engage the adjacent arm 10 of the swing.-

ing arbor frame, the engagement of the latch plate serving to hold the saw arbor frame. in

its upper position with the saws in the path of travel of the tubing, after the arbor frame has been swung to this position.

Connected to the lever is a rod 13 1, the opposite end ofw-hich is connected-t0 a bell crank 135 pivoted on a bracket on the table is defective .or the inachinebecomescloggedand to permit the defective tubing tobe run top 1. the other end of the bell crank engaging a collar 136 adjustably mounted on pull rod 103, which latter actuates the trip lever 102 controlling the clutch mechanism. To the upper end of the lever 130 is pivoted one end of a rod 137, which passes through a perfo rated lug 97 secured to the upper side of arm 96, which latter serves directly to return the saws to their initial inoperative position, as hereinbefore explained. Ad ustably mount-- ed onthe rod 137 is a collar or abutment 139, which, as the arm 96 is swung by the movement of the cutters with the tubing during .the cutting operation, is engitged by lug 97,

thereby swinging lever 130 to isengagelatch plates 132 and 133,so as to permit the cutter arbor frame to drop. and also to move rod 134 to the right as shown in Fig, 1',thereby rocking bell crank 135, raising rod 103 and swinging trip lever 102 out of engagement with the lug 67 to cause a reengagement of the-clutch mechanism; and'thereby effect asecond half revolution of the loose clutch member 56, whereby all of'the parts are re: stored tonormal operative position.-

' Under certainzcondition's, it is 'founddesirable and necessary to suspend the cutting operation, as, for example, when the tubing through the machine without being out. To

' efi'ect this result, a special lockout mechanism to prevent the ngagementbf the clutch.

members and also to latch the trip mechanism and stripping. means in inoperative position and permit the free passage of the tubing ast the trip mechanism, is; provided, this ockout mechanisrn being efieetive after the completion of .a cutting operation. Secured the flange 65 on collar 57. .(see Fig. 4) and --m the rear of lug 67 on said flange isa stop lug 147, which is adapted to. be .-e

shaft 150, whiehshaft is journaled in bearlngs in the housing'45. Connected to the shaft is a hand crank 151 provided with a spring latch pin 152 cooperating with .'a notched retaining plate 153 securedto the side of the machine frame. When the crank handle is swung in a direction'to move pin 148 in the path of movement,of lug 67. the

gagement of the clutch members in the same engagement of these parts effects the disennmnner; as the engagcmentof the end of trip lever 102, and prqhts the further operation of the clutch-mechanism untiLthe handle 151 is moved to the ;opposite position, which swings the. pin 148 ont of the nth of niovw ment of the-lug 147; Also fixer on 'the'shait 150 IS a crank arm 154' connected by a riodlfifi with a bell crank 156 mounted bar' 1' 6, the

upper-arm of'the bell-crank being pinned to a prl rod 157.. the opposlo (rid of which is pinjconnected with a swinging latch 15$ pivoted to the braole't 11 1, the lower hook end of the aged b a pin 148 on the end of a lever 149 h l ountedn latch 158 being adapted to engage a pin 159 on the rear face of the cam plate 123 and serving to arrest the rotatory movement of said cam plate and the radial arms ofthe trip and stripping devices in the position -ch ine, either from-the tube forming mechanism or from any other source, over the mandrel, the latter being maintained in proper feeding position by the guide member 14, and extending through the cutting machineto apoint just short oi the vertical position of the trip arm 116,150 that the latter will clear the end of the mandrel, but the mandrel will nevertheless constitute an effective support for the tubing during the entire cutting operation and for the cut sections of the tubing until the latter are stripped from the forward end of the mandrel. When the advance end of the tubing engages the trip plate 116, as shown in Fig. 5, the latter is swung forward, thereby imparting a par-' tial rotation to the hub 117 and the flange 119 shownin Figs. 1 and 3, when all of the'radial carrying lug 120 and the cam plate 123. The

lug 120 engages the lower end of lever 112 rocking the lattler and exercising a forward pull on rod 110 connected to said ver, which rocks bell crank 104; which moves rod 103 upward'and rocks-lever 102, so. that'its end is moved out of engagement with lug 66, thereby permitting clutch member-541170 be yautomatically engaged with clutch member 53 fastto shaft 52, as hereinbeforeexplainedi" This causes a rotation of sleeve 56 and the elements carried thereby. At thistime, the

high part of cam 85 .on sleeve 56 passes. out of engagement with .roller- '86 on lever 87,. which will permit, the lever 87 to inove forward in the direction of movement of the tub ing, so that the saws will be free to travel with the tubing; when they are engagedtherewith.

Immediately after the freeing of the lever 87,

the lug 76 on rock lever 77 will drop behind shoulder '75-on cam 74; and; permit spring 79-to move the outer end oflever 77 upward and with it.;rod 81, thereby swinging the" frame carrying'the saw arbor upward until the saws are engaged with the tubing. Upon completion of thej u ward movement of the. saws, the latch 'mein er1132"on lever 130 en gages arm 10. of'athe saw arbor frame and thereby locks the. saws in their upper position until the v cutting operation has been completed. Thelsaws, 'Which are constantly driven through the belt connection of'the arbor 11 with the drive pulley -5, inovewith the tubing during the cutting operation. The

action of the spring 2'9 is to move the saws quickly into engagement with the tubing im mediately after they have been freed by the release of lever 87 by the high portion of the cam 85.

The machine, as described, is constructed so that the clutch-membcufiel will be stopped at 4 the end of each half revolution. The reason for this particular operation is that, in cutting very large tubes, the saws require more I time to efi'ect the out, due to the fact that the larger tube rot-ates more slowly on the'mam drel and the helical ,turns' are longer, than those of the smaller tube and, therefore, a relatively longer time is required to etl'ect acomplete severance of the sections of the larger tubing. For this reason, the lug 67,

carried by the collar-like members 57, is arbe allowed to permit the saws to finish, the cuts in the larger tubing.

The completion of the cutting operation is determined by the adjustment of the collar 139 on rod 137 and the engagement ofsaid collar by the lug 97 on the lever 96, which moves with the saws and which is also instrumental in returning the saws to initial position. This collar 139 is so adjusted on the rod 137 astobe engaged by the lug 97 as aforesaid, immediately after the saws have 1 completed'the'severance of the three sections 40 from the end of the tubing. The movement of the rod 131 by the engagement of collar139 by lug 97 swings lever 130 to disengage latch 7 member 132 irom frarne arm, 10, thereby permitting the frame carrying the saw arbor to drop to its lower position, which action is rendered possible byreason of the fact that the cam 74. has made a half revolution with the first operation of the clutch, so that the rod 81 has been dropped to its lower position, the dropping of the rod being permitted by reason of the elongated slot in the adjustable member 83 on the end of the rod engaging the pinBdsecured to, the armlO of the saw arbor frame. "The rocking movement of the lever "130 actnates rod 134 to r'ock bell crank 138, and through collar 136 to lift rod 103, thereby disengaging the forward-end otlever 102 from lug 67, permitting the automatic en-- gagement of the clutch, so that the second half revolution "of the sleeve 56 is effected and the parts carried thereby return to normal position, as indicated in Fig 7. The second half revolution of the cam is etl'ective in moving lever 81 to the left, as indicated in Fig. 7, thereby causing rod '89 to move the.

. same from the mandrel.

gang of saws along the arbor 11 to initial in operative position ready to take up the next cycle. v

As hereinbefore stated, the saws during the cutting operation. move forward on their 106 and the length 01' the other sections being I fixed by the spacing of the saws. As the ad vancing end of the tnbi ng, during the cutting operation, forces trip arm 116 forward in a rotary path, the roller 124; on arm 125 rides out 'oii'the notch in the cam plate onto the adjacent cam section, which is given a curve-- ture s0- thatthegipward pressure of the roller due to the spring 127, will impart a rotatory movement of one hundred and twenty degrees to the three radial arms carried by the hub 117, thereby causing arm 116 to engage the first cut section of the tubin and knock the sanieloil ofthe mandrel. Tne roller 12st on lever 1-25 then engages the noth adjacent arm 116 and the rotatory trip and stripping arms are arrested for a moment with arm 116" in position to be engaged by the front edge of the second cut tube section, the advance of which initiates another rotatory movement of the arms until the roller 12% rides on the second cam section, to Wit, that immediately following arm 116 and the three areas areagain rotated in unison until. they complete a. movement of approximately one hun dred and'tweutydegrees, when arm 116 en gages the second tube section and ltnocksthe' Thisoperation is repeated by the third cut section of tubing engaging arm 116, thereby bringing the trip arm 116 into engagement with the third sec tion of tubing-and stripping the same from the mandrel, the arm; 11?; being brought to rest in the position showntin Fig. 5 somewhat in adl'anc'e of the end of the uncut tubing ready to be engaged thereby to initiate the next cutting operation.

i As hereinbeQti 'e stated, it is desirable at lIlIIlBSrtO suspend the cutting operation in order toidistharge a section of defective tubing through the machine without cutting the same and, in order to bring this about, the

handle 151 ismovedio the position shown in Fig. 3, 50 that the piri- 148 on arm 149lies in the path of lug 147 on "flange 65 of the collar: like member 57 and to the rear of stop lug 61'. The operation of handle "151 also rock's lever 154, which, through pull rod155, bell crank 156,pullrod 157 and collar 160, rocks bell crank 10%, lifting rod 103 and rocking lever 102 to disengage lug 66, which permits the en gagenient or the clutch rnen'ibers to ii-iiitiate a rotation oi the member sleeve and col lar 5?", which movement immediately at rested, however, by the engagement of pin 1-48 with lug 67 and the machine is thus locked out or in inoperative position so long as handle 151 is retained in the. adjustment indicater The movement of handle 151 also ef fects the locking of the trip and stripping mechanism in inoperative position, as hereinbefore explained; that is to say, arm 15% lifts rod 155 which rocks bell crank 156, moving pull rod 157 to the right, as shown in Fig. 3, and forcing the latch lever or gag 158 into engagement with the, pin 140 on the cam plate 123 as soon as said pin is moved by the rotation of the trip plate by the advancing tubing, the position of the radial arms of the trip and stripping mechanism being that indi cated in 1 and 3 and is shown in locked position'completely above and out of the path of travel of the defective tubing passing through the machine. In order to restore the machine to operative condition, it is only necessary to swing the handle,151 to move the pin 148 out of engagement with stop lug 14:7 and, as rock lever 102 is out of stopping engagement with the opposite lug 66, the clutch members are automatically engaged and a new cycle of cutting operations is begun, it being understood that the return of handle 151to initial position also releases the latch or gag 158 from engagement with the plate 159, thereby restoring the trip mechanism to normal position.

What I claim is: g

1. In a tube cutting machine, a cutter mechanism mounted for transverse and parallel movements relative to the travel of the tubing, a constantly driven shaft, mechanism operative to project the cutter mechanism into the path of travel of the tubing including fast and loose clutch members on said shaft, a trip mechanism operative to engage the clutch members to effect. the operation of the cutter projecting mechanisnnand an independent stop device adapted to be engaged with the loose clutch members to render the same inoperative.

2. In a tube cutting machine, a cutter mechanism having a movable support, a constantly driven shaft, mechanism operative to project the cutter mechanism into the path of travel of the tubing, said mechanism including fast and loose clutch members on said shaft, mechanism controlling the movable clutch member having a displaceable element operable to initiatethe operation of said controlling mechanism, and an indepndent stbp device adapted to be engaged with the loose clutch member to render the same inoperative.

3. In a tube cutting machine, a cutter mechanism mounted for transverse and parallel movements relative to the travel of the tubing, a constantly driven shaft, mechanism operative to project the cutter mechanism into the path of travel of the tubing including fast and loose clutch members on said shaft, a trip mechanism operative to e'n, g;age

the clutch members to elfect the operation of the cutter projecting mechanism, and an independent stop device comprising a lug on. the loose clutch member, and a control member movablei'nto the path of'movemen't of said lugjto hold the loose clutch member in inoperative pos tion.

a. In a tube cutting machine, a cutter mechanism mounted for transverse and parallel movements relative. to the travel of the tubing, a constantly driven shaft, mecha nism operative to pro ect the cutter mech anisin into the path of travel ol' the tubing including fast and loose clutch memberson said shalt, a trip mechanism operative to engage the clutch members to cl'i'ect the operaiion of the cutter projecting mechanism, and an independent stop device comprising a pivoted. lever on the machine frame and a lug on the loose clutch member, and means for i'noving said lever into the path of move-x5 ment of said lug to hold the loose clutch niem her in inoperative position.

In a tube cutting machine, acutte'r mechanism having a movable support, a constantly driven shaft, mechanism operative to project the cutter mechanisminto the path of travel of the tubing, said mechanism including fast and loose clutch members on said shaft, mechanism controlling the movable clutch member 'l'iaving' a displaceable clement operable'to in'it ite the operation of said controlling mechanism, and an inde pendent stop devicev comprising a lug on the loose clutch meniber t nd acontrol member movable into tl-i eipa th of movement of said lUC big to hold the loose clutch member in 'in.

lever on the machine fra me and a lug on the loose clutch member, and means for moving said lever into the path of movement ofsaid lug to hold the loose clutch member in inoperative position.

7. In a tube cutting machine, a cutter mechanism having amovable support, a constantly driven shaft, mechanism operative to project the cutter mechanism into the path of travel of the tubing, said mechanism including fast and loose clutch members on said shalt, mechanism controlling the loose clutch member having a pivoted, trip plate normally positioned in the path of travel of the tubing to be displaced by the advanclid i la;

ing end of the latter to initiate the operation of said controlling mechanism, and an independent stop device adapted to be engaged with the loose clutch member and with the pivoted trip plate to lock both of said members in their inoperative positions:

8. Ina tube cutting machine, a cutter mechanism having a movable support,'a constantly driven shaft, mechanism operative to project the cuttermechanism into the path of travel of the tubing, said,mechanism in bluding fast and loose clutch members on said shaft, mechanism controlling the loose clutch member'having a pivoted trip plate normally positioned in the path of travel of the tubing to be displaced bythe advancing end'of the latter to initiate the operation of said controlling n1 'chanism, and an independent stop device comprising a rock shaft journaled on the machine frame, a lever fast to said shaft, a handle for rocking said shaft, and a 1m on the loose clutch member engageable wit said leverto hold the loose clutch member in its inoperative position;

- 9. In a tube cutting machine,'.a. cutter mechanism mounted for transverse and parallel movements relative to the travel of the tubing, a constantly driven shaft, mechanism operative ,to project the cutter mechanism,

into the path of travel of the tubing including fast and loose clutch members on said shaft, a trip mechanism operative toengage the clutch members to effect the operation of the cutter projecting mechanism, and an independent stop device adapted to be engaged by the loose clutch member and the trip 1nechanism to lock the same in their inoperative positions.

- 10. In a tube cutting machine, a cutter mechanism having a movable support, a constantly driven shaft, mechanism operative to project the cutter mechanism into the path of travel of the tubing, said mechanism including fast and loose clutch members on said shaft, mechanism controlling the movable clutch member-having a displaceable clement operable to initiate the operation of said controlling mechanism, and an independent stop device adapted to be engaged by the loose clutch member and the displaccable element to lock the same in their inoperative positions. v

'- 11. In a tube cutting machine, a cutter mechanism having a movable support, a constantly driven shaft, mechanism operative to project the cutter mechanism into the path of travel of the tubing, said mechanism including-fastjand loose clutch members on said shaft, mechanism controlling the loose clutch member having a pivoted trip late normally positionedin the path of travel to be displaced by the advancing end of the latter to initiate the o eration of said controlling mechanism, an anindependent stop of the tubing.

travel of the tubing", said mechanism including fast and loose --clutch members on said shaft, mechanism controllin the loose clutch member having a'pivoted trip lat-e normally positioned in the path of trave of the tubing to be displaced by the advancing end cit-the" latter to initiate the operation of said co'n-- trolling mechanism, a independent sto mechanism adapted. to l ck the loose clutc member and the trip plate in their inoperative positiomsaid stop mechanism including a lug on the trip plate, and a latch, adapted to engage said lug and hold the trip p ate in raised position i 13. In a tube cutting machine, a cutter mechanism having a movable support, a co11- stantly driven shaft, mechanism operative to project the cuttermechanism into the path of travel of the tubing, said mechanism includmg fast and loose clutch members on said I shaft, mechanism controlling the loose clutch member having a pivoted trip plate normally positioned in the path of travelof thetubing to be displaced by the advancing end of the latter to initiate the operation of said controlling. mechamsin, an independent sto mechanism adapted to lock the loose clutci member and the trip plate in their inoperative positions, said stop mechanism comprisframe, a lever fast to said shaft, a handle for rocking said shaft. a hug on the loose clutch member cngagcable withv said lever to hold the loose clutch member in inoperative position, a lug on the trip plate, a pivoted latch adapted to engage the. lug and hold the trip plate in raised position, and connections between Fzlltl' latch and rock shaft to swing the latch into engagement with the lug on the trip plate. i

14. In a tube cutting" machine, a cutter mg a rock shaft journaled in the machine mechanisn'i having a movable support, a constantly drivenshaft, mechanism operative to project the cutter mechanism into the path of travel of the tubing, said mechanism including fast and loose clutclrmembers on said shaft, mechanism controlling the loose clutch member having a pivoted trip plate normally positioned in the path of travelof the tubing to be displaced by the advancing end of the latter to initiate the operation of'said con trolling mechanism, an independent stop mechanism. adapted to lock the loose clutch member and the trip plate Ill their inoperative positions, said stop mechanism compris-.

ijhg a rock shaft journaled on the machineframe, a lever fast to said shaft, a handle for .rocking salid shaft, a lu on the loose clutch member engageeble. with said lever to hold the loose-clutch member in inoperative position, :1 lug on the trip late, a pivoted latch {I adapted to engage the ug and hold the trip plate in raised position, a second lever fast to the rock shaft, a lift rod connected to said EDGAR M. HAWKINS. 

